on another post you wrote:
Are your parents still married?
If yes, are they separated due to work and still live their lives as a married couple or is it their intent to divorce?
When you filed the FAFSA, did you include both of their incomes?
If your parents are no longer married or legally separated/intending divorce then you would only file the income/assets of your custodial parent, which would be your mom.
If you are filing with just your mom as the custodial parent, then you must include her share of the equity in California house as an asset, since that is not your primary residence. Any alimony/child support paid by your dad must go on the FAFSA.
If your parents are married, with the intent of staying married, then both of their incomes will go on the FAFSA and the equity California home would be an asset. If this is the case, it could very well explain the reason for your high EFC.